Headlight Dimmer Switch Inspection

Body Electrical. Lexus Gs430, Gs300. Uzs190 Grs190
Lighting. Lexus Gs430, Gs300. Uzs190 Grs190

  1. INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY

Headlight Dimmer Switch -- Inspection



1. INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY


Lexus Gs430, Gs300. Uzs190 Grs190.Lighting.Lighting System.Headlight Dimmer Switch Inspection

  1. Disconnect the switch.

  1. Measure the resistance of the switch.

    Standard resistance:
    LHD and light control switch LH side for RHD::
    Light control switch:
    Tester Connection
    		Switch Condition
    		Specified Condition
    g1-12 (EL) - g1-18 (T)
    		OFF
    		10 kΩ or higher
    g1-18 (T) - g1-19 (AUTO)
    		OFF
    		10 kΩ or higher
    g1-19 (AUTO) - g1-20 (B)
    		OFF
    		10 kΩ or higher
    g1-12 (EL) - g1-18 (T)
    		TAIL
    		Below 1 Ω
    g1-12 (EL) - g1-18 (T)
    		HEAD
    		Below 1 Ω
    g1-18 (T) - g1-20 (B)
    		HEAD
    		Below 1 Ω
    g1-12 (EL) - g1-19 (AUTO)
    		AUTO
    		Below 1 Ω
    Headlight dimmer switch:
    Tester Connection
    		Switch Condition
    		Specified Condition
    g1-11 (BU) - g1-12 (EL)
    		LOW BEAM
    		Below 1 Ω
    g1-11 (BU) - g1-12 (EL)
    		HI BEAM
    		Below 1 Ω
    g1-12 (EL) - g1-17 (HF)
    		HI BEAM
    		Below 1 Ω
    Turn signal switch:
    Tester Connection
    		Switch Condition
    		Specified Condition
    g1-12 (EL) - g1-13 (TR)
    		Right turn
    		Below 1 Ω
    g1-12 (EL) - g1-13 (TR)
    		Neutral
    		10 kΩ or higher
    g1-12 (EL) - g1-15 (TL)
    		Neutral
    		10 kΩ or higher
    g1-12 (EL) - g1-15 (TL)
    		Left turn
    		Below 1 Ω
    Fog light switch:
    Tester Connection
    		Switch Condition
    		Specified Condition
    g1-3 (LFG) - g1-4 (BFG)
    		Fog light switch OFF
    		10 kΩ or higher
    g1-3 (LFG) - g1-4 (BFG)
    		Fog light switch ON
    		Below 1 Ω
    Rear fog light switch (w/ Rear fog light):
    Tester Connection
    		Switch Condition
    		Specified Condition
    g1-2 (B) - g1-3 (LFG)
    		Dimmer switch ON
    		Below 1 Ω
    g1-3 (LFG) - g1-4 (BFG)
    		Dimmer switch ON
    		Below 1 Ω
    g1-2 (B) - g1-3 (LFG)
    		Dimmer switch OFF
    		10 kΩ or higher
    g1-3 (LFG) - g1-4 (BFG)
    		Dimmer switch OFF
    		10 kΩ or higher
    Light control switch RH side for RHD:
    Light control switch:
    Tester Connection
    		Switch Condition
    		Specified Condition
    g1-11 (B) - g1-12 (AUTO)
    		OFF
    		10 kΩ or higher
    g1-12 (AUTO) - g1-13 (T)
    		OFF
    		10 kΩ or higher
    g1-13 (T) - g1-19 (EL)
    		OFF
    		10 kΩ or higher
    g1-13 (T) - g1-19 (EL)
    		TAIL
    		Below 1 Ω
    g1-11 (B) - g1-13 (T)
    		HEAD
    		Below 1 Ω
    g1-13 (T) - g1-19 (EL)
    		HEAD
    		Below 1 Ω
    g1-12 (AUTO) - g1-19 (EL)
    		AUTO
    		Below 1 Ω
    Headlight dimmer switch:
    Tester Connection
    		Switch Condition
    		Specified Condition
    g1-15 (HU) - g1-19 (EL)
    		LOW BEAM
    		Below 1 Ω
    g1-14 (HF) - g1-15 (HU)
    		HI BEAM
    		Below 1 Ω
    g1-15 (HU) - g1-19 (EL)
    		HI BEAM
    		Below 1 Ω
    Turn signal switch:
    Tester Connection
    		Switch Condition
    		Specified Condition
    g1-16 (TR) - g1-19 (EL)
    		Right turn
    		Below 1 Ω
    g1-16 (TR) - g1-18 (TL)
    		Neutral
    		10 kΩ or higher
    g1-18 (TL) - g1-19 (EL)
    		Neutral
    		10 kΩ or higher
    g1-18 (TL) - g1-19 (EL)
    		Left turn
    		Below 1 Ω
    Fog light switch:
    Tester Connection
    		Switch Condition
    		Specified Condition
    g1-7 (BFG) - g1-8 (LFG)
    		Fog light switch OFF
    		10 kΩ or higher
    g1-8 (BFG) - g1-9 (LFG)
    		Fog light switch ON
    		Below 1 Ω
    Rear fog light switch:
    Tester Connection
    		Switch Condition
    		Specified Condition
    g1-7 (BFG) - g1-8 (LFG)
    		Dimmer switch ON
    		Below 1 Ω
    g1-8 (LFG) - g1-9 (B)
    		Dimmer switch ON
    		Below 1 Ω
    g1-7 (BFG) - g1-8 (LFG)
    		Dimmer switch OFF
    		10 kΩ or higher
    g1-8 (LFG) - g1-9 (B)
    		Dimmer switch OFF
    		10 kΩ or higher
    If the result is not as specified, replace the switch assembly.